Biocenosis naturality index, diversity, Dragonflies and Damselflies, indicator, Odonata, peat-bogs, Czech Republic, Slovakia.

Odonata are good indicators of a natural character of zoocoenoses and are used to monitor the ecological status of peat bogs. Some results of such evaluations showed that the level of natural composition of peat-bogs odonatocoenoses is higher with higher altitude, acidity and age of habitat, to the contrary in extreme habitats significantly the number of species drops; the natural character of odonatocoenoses don´t depend from the size of the habitat.

Odonata are good indicators of a natural character of zoocoenoses and are used to monitor the ecological status of peat bogs. Some results of such evaluations showed that the level of natural composition of peat-bogs odonatocoenoses is higher with higher altitude, acidity and age of habitat, to the contrary in extreme habitats significantly the number of species drops; the natural character of odonatocoenoses don?t depend from the size of the habitat.